<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>基本按钮样式</title>
    <style>
        .button {
            background-color: #4CAF50;
            border: none;
            color: white;
            padding: 15px 32px;
            text-align: center;
            text-decoration: none;
            display: inline-block;
            font-size: 16px;
            margin: 4px 2px;
            cursor: pointer;
        }
    </style>
</head>

<body>

    <h2>CSS 按钮</h2>

    <button>默认按钮</button>
    <a href="#" class="button">链接按钮</a>
    <button class="button">按钮</button>
    <input type="button" class="button" value="输入框按钮">

</body>

</html>